Vulnerability · CVE-2025-54407
Stored cross-site scripting vulnerability exists in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2.
Published Dec 12, 2025 · catalog updated Dec 12, 2025 · Japan Total System Co.,Ltd. GroupSession Free edition
Last checked Oct 27, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-54407. EPSS is 0.19%. Act only if a listed version of Japan Total System Co.,Ltd. GroupSession Free edition is installed.
Gaps on this record
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
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- Severity
- Medium5.1
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.19%
- Remediation
- Advisory link
- Affected products
- vendor Japan Total System Co.,Ltd. GroupSession Free edition prior to ver5.3.0
Stored cross-site scripting vulnerability exists in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. If a user accesses a crafted page or URL, an arbitrary script may be executed on the web browser of the user.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Japan Total System Co.,Ltd. GroupSession Free edition prior to ver5.3.0prior to ver5.3.0
How to fix CVE-2025-54407
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
Seen in prior to ver5.3.0
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-54407. EPSS is 0.19%. Act only if a listed version of Japan Total System Co.,Ltd. GroupSession Free edition is installed.
Which versions are affected?
Compare what you have installed with Japan Total System Co.,Ltd. GroupSession Free edition prior to ver5.3.0 prior to ver5.3.0. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.19%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Dec 12, 2025 · EUVD
Detected
Stored cross-site scripting vulnerability exists in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. If a user accesses a crafted page or URL, an arbitrary script may be executed on the web browser of the user.
Dec 12, 2025 · EUVD
Updated
Stored cross-site scripting vulnerability exists in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. If a user accesses a crafted page or URL, an arbitrary script may be executed on the web browser of the user.
Sources
- CVE.orgVulnerability recordCVE-2025-54407
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-54407
30-day exploitation probability 0.19%
first.org - EUVDVulnerability recordEUVD-2025-203027
Stored cross-site scripting vulnerability exists in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. If a user accesses a crafted page or URL, an arbitrary script may be executed on the web browser of th
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 27, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- CVE.orgOct 27, 2026
- FIRST EPSSOct 27, 2026
- EUVDOct 27, 2026